Arnica aprica Greene accepted as Arnica latifolia Bong. (original description)
Arnica aspera Greene accepted as Arnica mollis Hook. (original description)
Arnica cana Greene accepted as Arnica chamissonis Less. (original description)
Arnica confinis Greene accepted as Arnica mollis Hook. (original description)
Arnica laevigata Greene accepted as Arnica latifolia Bong. (original description)
Aster microlonchus Greene (original description)
Gnaphalium macounii Greene accepted as Pseudognaphalium macounii (Greene) Kartesz (original description)
Gnaphalium proximum Greene accepted as Pseudognaphalium stramineum (Kunth) Anderb. (original description)
Senecio crepidineus Greene accepted as Senecio elmeri Piper (original description)
Senecio dileptiifolius Greene (original description)